【摘要】：隨著我國(guó)住宅產(chǎn)業(yè)化進(jìn)程的加快,裝配式混凝土結(jié)構(gòu)因其不可取代的優(yōu)勢(shì)重新成為當(dāng)前的研究熱點(diǎn)。裝配式灌芯混凝土剪力墻是一種新型的裝配式剪力墻結(jié)構(gòu),對(duì)其受力性能的認(rèn)識(shí)并不全面。所以系統(tǒng)地研究各參數(shù)和構(gòu)造措施對(duì)裝配式剪力墻受力性能的影響是了解這種新型剪力墻抗震性能的必由之路。本文基于擬靜力試驗(yàn)和數(shù)值模擬技術(shù)對(duì)裝配式灌芯混凝土剪力墻的抗震性能進(jìn)行了全面深入的研究。本試驗(yàn)設(shè)計(jì)了4片剪力墻試件,其中一片為現(xiàn)澆剪力墻,其余三片為不同裝配形式的剪力墻試件,并進(jìn)行了低周往復(fù)荷載試驗(yàn)。根據(jù)試驗(yàn)數(shù)據(jù)繪制出滯回曲線和骨架曲線,并在此基礎(chǔ)上分析了試件的承載力、延性與變形能力、剛度衰減以及耗能能力,并對(duì)比裝配式剪力墻與現(xiàn)澆剪力墻受力性能的差異。通過(guò)分析試驗(yàn)數(shù)據(jù)與試驗(yàn)現(xiàn)象得出:現(xiàn)澆剪力墻的滯回曲線比裝配式剪力墻略微飽滿一些,裝配式剪力墻的耗能能力相比現(xiàn)澆剪力墻略差一些,全預(yù)制剪力墻的耗能能力要好于其他兩種裝配形式的預(yù)制剪力墻;裝配式剪力墻和現(xiàn)澆剪力墻的骨架曲線走勢(shì)相近、形狀類似,說(shuō)明裝配式剪力墻的承載能力與現(xiàn)澆剪力墻相當(dāng);三種不同裝配形式的預(yù)制剪力墻的極限位移角在1/54~1/71之間,均滿足剪力墻結(jié)構(gòu)大震作用下彈塑性層間位移角的要求;裝配式剪力墻剛度退化規(guī)律與現(xiàn)澆剪力墻一致,都是在屈服前剛度退化較快,進(jìn)入彈塑性階段后趨于平緩。本文使用大型通用有限元軟件ABAQUS對(duì)裝配式灌芯混凝土剪力墻進(jìn)行有限元模擬計(jì)算,與試驗(yàn)骨架曲線和裂縫分布進(jìn)行對(duì)比,并系統(tǒng)地分析了軸壓比、邊緣構(gòu)件縱筋配筋率和墻身配筋率對(duì)裝配式灌芯混凝土剪力墻受力性能的影響。分析結(jié)果表明,模擬計(jì)算結(jié)果與試驗(yàn)結(jié)果吻合良好;軸壓比對(duì)剪力墻受力性能影響顯著;邊緣構(gòu)件縱筋配筋率和墻身配筋率對(duì)剪力墻的延性有一定影響,對(duì)峰值承載力影響不大。基于試驗(yàn)結(jié)果,對(duì)裝配式剪力墻的承載能力與變形能力進(jìn)行進(jìn)一步的理論分析,提出簡(jiǎn)便的正截面承載力和屈服位移計(jì)算公式,并與試驗(yàn)值和模擬值對(duì)比,證明其合理性。
[Abstract]:With the acceleration of housing industrialization in our country, the prefabricated concrete structure has become a hot research topic again because of its irreplaceable advantages. The prefabricated concrete shear wall is a new type of prefabricated shear wall structure. Therefore, it is the only way to understand the seismic behavior of the new type shear wall by systematically studying the influence of various parameters and construction measures on the mechanical performance of the fabricated shear wall. Based on pseudo-static test and numerical simulation technique, the seismic behavior of prefabricated concrete shear wall is studied thoroughly and thoroughly in this paper. Four shear wall specimens are designed, one of which is cast-in-place shear wall, the other three are shear wall specimens with different assembly forms, and the low-cycle reciprocating load test is carried out. The hysteretic curve and skeleton curve are drawn according to the test data. On this basis, the bearing capacity, ductility and deformation capacity, stiffness attenuation and energy dissipation capacity of the specimens are analyzed, and the difference between the prefabricated shear wall and the cast-in-place shear wall is compared. Through the analysis of test data and experimental phenomena, it is concluded that the hysteretic curve of cast-in-place shear wall is slightly fuller than that of fabricated shear wall, and the energy dissipation capacity of fabricated shear wall is a little worse than that of cast-in-place shear wall. The energy dissipation capacity of fully prefabricated shear walls is better than that of the other two kinds of prefabricated shear walls, and the skeleton curves of fabricated shear walls and cast-in-place shear walls are similar and similar in shape. The results show that the load-carrying capacity of prefabricated shear wall is equivalent to that of cast-in-place shear wall, and that the ultimate displacement angle of prefabricated shear wall with three different assembly forms is between 1 / 54 / 1 / 71, which meets the requirements of elastic-plastic interstory displacement angle of shear wall structure under strong earthquake. The stiffness degradation law of prefabricated shear wall is consistent with that of cast-in-place shear wall. The stiffness of preyield shear wall degenerates rapidly and tends to be gentle after entering the elastic-plastic stage. In this paper, the finite element method is used to simulate and calculate the prefabricated concrete shear wall with universal finite element software ABAQUS, which is compared with the experimental skeleton curve and crack distribution, and the axial compression ratio is analyzed systematically. The influence of reinforcement ratio of longitudinal reinforcement and reinforcement ratio of wall body on the mechanical behavior of prefabricated concrete shear wall. The results show that the simulated results are in good agreement with the experimental results, the axial compression ratio has a significant effect on the mechanical performance of the shear wall, and the reinforcement ratio of longitudinal reinforcement and the reinforcement ratio of the wall body have some effects on the ductility of the shear wall. It has little effect on the peak bearing capacity. Based on the experimental results, the bearing capacity and deformation capacity of the assembled shear wall are further analyzed, and a simple formula for calculating the bearing capacity and yield displacement of normal section is proposed, and compared with the experimental and simulated values, the rationality of the formula is proved.
【學(xué)位授予單位】：吉林建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TU352.11;TU398.2

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